| Noun | 1. | manslayer - a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)assassin, assassinator, bravo - a murderer (especially one who kills a prominent political figure) who kills by a surprise attack and often is hired to do the deed; "his assassins were hunted down like animals"; "assassinators of kings and emperors" butcher - a brutal indiscriminate murderer criminal, crook, felon, malefactor, outlaw - someone who has committed a crime or has been legally convicted of a crime cutthroat - someone who murders by cutting the victim's throat fratricide - a person who murders their brother or sister gun for hire, gunman, gunslinger, hired gun, hit man, hitman, torpedo, triggerman, gun, shooter - a professional killer who uses a gun hatchet man, iceman - a professional killer infanticide - a person who murders an infant mass murderer - a person who is responsible for the deaths of many victims in a single incident murderess - a woman murderer parricide - someone who kills his or her parent ripper - a murderer who slashes the victims with a knife; "Jack the Ripper was probably a madman" serial killer, serial murderer - someone who murders more than three victims one at a time in a relatively short interval |